import re
regex = re.compile(r"""
#Command handler
#===============
#Start of the line
^ #Match the command name
(?<cmd>[\w\d\-\_\?]+)
#Catch as many parameters as possible
(?<params>
(
\ +
(?<pre>[^\-\\\/\w\d\s\n\r]?)
[^\"]*\k<pre>
)*
)?
#Catch as many switches as possible and save them into group
(?<switches>
(
\ +
#Switch starts with -- or - or /
(?:\-\-|\-|\/)
#Gotcha!
[\w\d\_]+
)*
)?
#At the end of the line can be some spaces
\ *$ #End of the line
""", flags=re.MULTILINE | re.VERBOSE)
test_str = ("help\n"
"echo \"lol\"\n"
"shutdown -s /f")
matches = regex.finditer(test_str)
for match_num, match in enumerate(matches, start=1):
print(f"Match {match_num} was found at {match.start()}-{match.end()}: {match.group()}")
for group_num, group in enumerate(match.groups(), start=1):
print(f"Group {group_num} found at {match.start(group_num)}-{match.end(group_num)}: {group}")
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html